00s acoustic alternative ambient angelic voices awesome ballad beautiful blues british chill chillout cool easy easy listening english favorite artists favourites female female artists female jazz vocalists female singers female vocal female vocalist female vocalists female vocals female voices folk gentle georgian guitar indie jazz jazz blues jazz pop jazz vocal jazzy katie melua love loved melancholic melancholy mellow piano pop relax relaxing rock romantic singer-songwriter slow smooth smooth jazz soft soft rock songwriter soul uk vocal vocal jazz